Forget it. I am not looking for subs or slaves at the moment. But I do get such requests on frequent occasions. So if you ask me what increases your chance that I or others reply posively to your request (or reply at all), here's my strong recommendation:
SHOW SOME EFFORT!
As soon as you write me, it takes me effort to reply. And I don't even know you, yet. You could not continue to write with me any moment. Again, I don't know you, and your first message no matter how long...